What makes a rainbow so bright? Why can't I hear a dog whistle? Four new titles in this amazing series from Belitha that explains the basic principles of science in an understandable and thought-provoking way. The Why Can't I...? series looks at the questions that children so often ask, and answers them using clear, simple explanations accompanied by fun. eye-catching photographs. - Practical science - the things that children really do wonder about. - A striking and unusual photographic approach brings the scientific explanations to life and captures the child's imagination. - The simple, well-balanced text is undaunting but still keeps its tight educational focus. - Additional notes for parents and teachers are included to support the child's learning. - Contains a table of contents, index, and a glossary.